Brake-shoe.



`-G. W. CHIPUEYy BRAKE SHQE.'

APPL'LCATIDN HLED AUG.5. 1914. 1 ,136,936. Patented Apr. 27, E Sl.

gmvffyroe By @6am Ammer To all whom 'it may concern sanas-secu. fr

masses.

Be it known that I, Glnornne W. CHL?- LEY, a citizen of the United States, and a made and invented certain new7 and use-ful Improvements in Brake-Shoes, of which the,

following is a specification'. v

' `My invention relates to an improvement in vbrake shoes particularly adapted forfuse in connection with railroad and railway cars. Heretofore brake shoes to be einployed in such service have usually been constructed of metal, such, for instance, as cast iron, cast steel, etc., but certain-.objections have' been urged against the use of metal and for-various reasons. ln the first,

place, it is well known that in order to give to the shoe a high co-cl'licient of friction, the metal must be comparatively soft, but when made up entirely of such metal, the life of 'the shoe is necessarily a short one, as it rapidly wears or burns away, due to the excessive heat generated by its frictional Contact with the tread of the `Wheel. lf, however, the shoebe made of comparatively hard metal, in' order to prolong the life thereof, it is apt to score, cut, or otherwise injure the tread of the wheel; furthermore, being brittle in v.its nature, is apt to .crack or break vwhile in service, To overcome these objections,'vitlxas been common in' the art to give to thel shoe a composite Wearing face, that is, to` construct the shoe partly of hard, and partly of soft, metah'by the use of inserts, the result being that the lshoe loe-4 comes expensive tovnianufacture.

The ob4 ect of myinvention is to produc a shoe which will possess both frictional and lasting qualitics.- and at the sainey time be comparatively cheap to manufacture, and

also light in weight, in order to materially decrease the cost of transportation or shippingr the same from rthe foundriesto the place of service. f

With these and other ends in View, the invention consists of a brake shoe constructed of hydraulic cement, reinforced through- .out the major portion thereof by metal, in

order to prevent injury thereto. and to hold the sections together in the ment that the shoe should berouw cracked or broken.

'the invention further mts: incertain Specicatic'cfjLetterslatentf' P'entd-Apr, 1915 "Applicants insa Augiisf 5,1914; sea-innocence.. Y'

Visfa view inside-elevation--of a brake shoe novel .features of "construction as will Ahereinafter fullyde'scribedagnd pointed out in theqelaiins.v resident. of Los Angeles, inthe county of Los Angeles and Stateof California, have constructed-in accordance with my'invention. F ig. 2is.y a: plan view, partly irl-elevation, and.A partly in',sec tion,to illustrate the-` metal reinforcenient'contained in thebody thereof." Figi 3'is ai'sectional view-taken onA the linef3-3 of Fig. 2, 'and looking in the direction as indicated by the arrow.

that the shoe is of the usual'configuration or type,- the body LJathereof being curved in its length to conform to the curvature of the wheel, and provided centrally with a Referring to the drawings, it will be seen lug for its attachment to a 'brake head not shown), this lug being preferably made of Wrought metal, the lower ends 8 thereof being outwardly flanged or bent, and anchored in the body of the shoe. This lug is preferably 'entirely surrounded by the cement of which the body el is constructed, with vthe exception of its upper side, the Wrought metal lug 5 thus reinforcing the cement which partially forms the attaching lug. The shoe, if desired,l is also lformed with the end stops 7 and guide lugs S, as

are usual in this type-'of'shoev The body of the shoe, as above stated, is Vmade.- of hydraulic cement, such,"for instance, as' Portland cement, either' alone,- or.- ,inixed with other constituents, the mixture Whichfl prefer 'consisting of about one por-` tion of cement totyvo portions of sand, al-v though, o`f course I do not ,intendv to in any Wise limit my claim to these' proportions or even Vthese constituents, the gistfof "myV in-L vention residing in the use of cement,either alone, ,onmixel with' other ingredients to form vthe bodyfof theshoe.'l lntlie shoe iscontained 'a metal reinforcement '.9' preferably in the forni of expanded'metal, 'wire mesh,or the like, although, of course, it will y he understood, Without further illustration or description, that the metal reinforcement` yer of ing lug -5,:in order to assist irmlyanchoring the latter to'the body of the shoe. In

v strong and durable in use, and possessesunmolding this shoe, it is desirable that the mixture `shall be of such consistency that itv the mold, .tha-mixture then again poured linto 'the mold-,fand then a reinforcement in* serted, :and en -'Ton until the mold is completely llledgj-@It is also desirable that the mixturevbe allowed to stand for several Weeks in ordenl that it Will firmly and completely set?, and the moisture entirely evaporated.

It will be understood that al shoe constructed as described is comparatively cheap to manufacture; that it'is light in weight,

,structed of cement and containing a metal usual frictional qualities, as well as lasting qualities.

'What I claim is:- A l '1. A brake shoe the major portionof Which'is constructed of hydraulic cement.

2. A brake shoe constructed vof reinforced hydraulic cement.

3. A brake shoe the body of which is conso reinforcement. 4. A bra-'ke shoe made of cement and sand, and the body of which contains a plurality of layers of expanded metal.

Signed at Los Angeles, in the county of 35 Los Angeles and State of'CaliAornia, this 10th day of J uly A QD. 1914. l GARDINER W. CHIPLEY. Witnesses:

J. T. BREWER,

C. G. WALLAcn 

